8 citations · 8 across the 9 of their papers we have counts for
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Mixed-state quantum geometry of dense two-color QCD matter
Kouji Kashiwa, Riki Oshima, Hiroaki Kouno
We investigate an information-geometric approach to dense two-color QCD using thermal states defined as normalized Gibbs states in the two-flavor Nambu--Jona-Lasinio model at the m…
The canonical approach at high temperature revisited
Kouji Kashiwa, Hiroaki Kouno
This paper discusses a paradox encountered when employing the canonical approach, particularly in the high-temperature region where the Roberge-Weiss transition exists at finite im…
Effective degrees of freedom, trace anomaly and c-theorem like condition in the hadron resonance gas model
Hiroaki Kouno, Riki Oshima, Kouji Kashiwa
The relation between the effective degrees of freedom (EDOF) and the trace anomaly is studied in the hadron resonance gas (HRG) model. If we regard the thermodynamical relation as…
Thermodynamic geometry in hadron resonance gas model at real and imaginary baryon chemical potential and a simple sufficient condition for quark deconfinement
Riki Oshima, Hiroaki Kouno, Motoi Tachibana +1
The thermodynamic geometry of the hadron resonance gas model with (without) excluded volume effects (EVE) of baryons is investigated. The case with imaginary mu, where mu is the ba…
Hadron-quark hybrid model, modular transformation and Roberge-Weiss transition
Hiroaki Kouno, Riki Oshima, Motoi Tachibana +1
In the framework of modular transformations, we reformulate the recently proposed hadron-quark hybrid model when the imaginary baryonic chemical potential is introduced. As a resul…
Polyakov-loop phase, Roberge-Weiss periodicity and thermodynamics
Kouji Kashiwa, Hiroaki Kouno
In this paper, we discuss the role of Roberge-Weiss periodicity in the thermodynamics of quantum chromodynamics at moderately high temperature, where the semi-quark-gluon plasma is…
Roberge-Weiss periodicity and singularity in hadron resonance gas model with excluded volume effects
Riki Oshima, Hiroaki Kouno, Kouji Kashiwa
Quantum chromodynamics (QCD) with pure imaginary baryon number chemical potential mu =i theta T, where T is temperature and theta is a real number, has the Roberge-Weiss periodicit…
Hadron-quark transition and chiral symmetry restoration at high density
Hiroaki Kouno, Kouji Kashiwa
A simple phenomenological hybrid hadron-quark model with effective volume effects of baryons and chiral dynamics is investigated. The hybrid EoS naturally connects the low density…